The establishment and spread of Tamarixia triozae, a parasitoid of the potato psyllid, in New Zealand

Abstract The release of Tamarixia triozae (Burks) (Hymenoptera: Eulophidae), a parasitoid the potato psyllid, Bactericera cockerelli (Šulc) (Hemiptera: Triozidae) , resulted in successful establishment New Zealand. was released at more than 30 sites by final year three-year study throughout Its continued presence over confirmed two regions (Hawke’s Bay and Canterbury). At one site Canterbury, only first summer this (Nov. 2017–Feb. 2018). It recovered from psyllid infested African boxthorn ( Lycium ferocissimum Miers) foliage second third summers site, demonstrating parasitoid’s ability to survive successive winters. We found T. parasitized nymphs 24 86 host plant surveyed within 25 km radius known Hawke’s Bay. up nearest In 0.6 site. Parasitism rates 13.7–15.6% were estimated based on post-release survey methods employed study. also feeds so its may lead helping reduce or delay populations reaching damaging levels. Long-term monitoring is needed determine consequences importing psyllid.